L_AnnResize - Raster Imaging C API Help

L_AnnResize

#include "l_bitmap.h"

L_LTANN_API L_INT L_AnnResize(hObject, dFactorX, dFactorY, pCenter, uFlags)

HANNOBJECT hObject;

handle to the annotation object

L_DOUBLE dFactorX;

factor by which to change the width of the object

L_DOUBLE dFactorY;

factor by which to change the height of the object

pANNPOINT pCenter;

pointer to the point that is to remain stationary

L_UINT uFlags;

flags that determine which objects to process

Changes the size of one or more annotation objects, letting you specify the point that is to remain stationary.

Parameter Description
hObject Handle to the annotation object.
dFactorX Factor by which to change the width of the object, used as follows:
  New width = Old width * dFactorX
dFactorY Factor by which to change the height of the object, used as follows:
  New height = Old height * dFactorY
pCenter Pointer to an ANNPOINT structure that specifies the point that is to remain stationary.
  You can pass NULL to use the default, which is the center of the object. If more than one object is selected, each object is resized on its own center.
  The ANNPOINT structure is like a Windows POINT structure, except that it uses double-precision floating point values.
  Coordinates of the point are relative to its container object. The coordinates are interpreted using the container's scaling factors and offsets, which are described in Low-Level Coordinate System for Annotations.
uFlags Flags that determine which objects to process. Most of the flags apply only to container objects. You can combine values when appropriate by using a bitwise OR ( | ). The following are valid values:
  Value Meaning
  0 Process only the specified object.
  ANNFLAG_SELECTED [0x0001] Process only objects that have the selected property set to TRUE. For getting and setting the selected property, use the L_AnnGetSelected and L_AnnSetSelected functions.
  ANNFLAG_NOTTHIS [0x0004] Process only one level of objects within the specified container, not the container itself. If there are containers within the container, they are modified, but the objects within them are not.
  ANNFLAG_RECURSE [0x0008] Process objects within a container, and within any subcontainers, down to any level.
  ANNFLAG_NOTCONTAINER [0x0002] (Used with ANNFLAG_RECURSE) Process objects within containers, not the containers themselves.
  ANNFLAG_NOINVALIDATE [0x0010] Do not invalidate the affected rectangle in the window. Use this to avoid generating unwanted paint messages.

Returns

SUCCESS

The function was successful.

< 1

An error occurred. Refer to Return Codes.

Comments

This function uses unscaled values that are relative to the container object. For more information, refer to Low-Level Coordinate System for Annotations.

This function applies to multiple and selected objects based on values of the uFlags parameter.

Required DLLs and Libraries

LTANN

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64.

See Also

Functions:

L_AnnRotate, L_AnnMove, L_AnnFlip, L_AnnReverse

Topics:

Annotation Functions: Doing Geometric Transformations

 

Implementing an Automated Annotation Program

 

Implementing a Non-automated Annotation Program

 

Displaying and Manipulating Annotation Objects

Example

This example resizes the container and all objects in it.

L_INT AnnResizeExample(HANNOBJECT hContainer)/* Container annotation object */ 
{ 
   L_INT nRet; 
   ANNPOINT ResizePt; /* Point to remain stationary */ 
 
   /* Set the origin of the container rectangle as the point to remain stationary */ 
   ResizePt.x = 0; 
   ResizePt.y = 0; 
   /* Resize the container and all objects in it, reducing the size by half */ 
   nRet = L_AnnResize(hContainer, (L_DOUBLE) 0.5,(L_DOUBLE) 0.5, &ResizePt, ANNFLAG_RECURSE); 
   if(nRet != SUCCESS) 
      return nRet; 
   return SUCCESS; 
} 

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